1 62 The American Geologist. March, i»99 
i66. *Descriptions of some new species of Crinoidea, and other 
fossils from the Lower Silurian strata, principally of the age of thv 
Hudson River Group. Ibid., p. 304. 
i67.*Descriptions of Bryozoa and Corals from the Lower Helder- 
berg Group of New York. Ibid., p. 304 (published in 26th Report, 
1874). 
168. *Descriptions of Bryozoa, etc., from the Upper Helderberg 
and Hamilton Groups of New York. Ibid., p. 304 (published in 
Trans. Alb. Inst., 1882). 
i6q. *Miscellaneous Notices. Ibid., p. 304. 
i;o. *On the Geological Relations of the Mastodon and Fossil 
Elephant. (See 21st Report on the State Cabinet of Natural His- 
tory, Albany, 1871.) Am. Assoc. Ad. Sci., i6th meeting, Burlington, 
1867; p. 161. Cambridge, 1868. 8vo. 
171. *On the Geographical Distribution of the Sediments and of 
the Fossils in the Hamilton. Portage and Chemung Groups of New 
York. Ibid., p. 161. 
172. *On the Value of the term Hudson River Group in Geological 
Nomenclature. (See also for printed notes Proceedings Nashville 
meeting. Am. Assoc. Ad. Sci. 1877.) Ibid., p. 161. 
173. *On the Occurrence of Fossil Sponges in the Successive 
Groups of the Palaeozoic Series. Ibid., p. 161. 
174. Geological History of the North American Continent; a lec- 
ture delivered before the American Institute in New York; p. 2\. Al- 
bany, i86g. 8vo. 
175. *Preliminary Notice of the Lamellibranchiata of the Upper 
Helderberg, Hamilton and Chemung groups. Proc. A. A. A. Sci., i8th 
meeting, Salem, 1869; p. 282. Cambridge, 1870. 8vo. 
176. Preliminary Notice of the Lamellibranchiate Shells of the Up- 
per Helderberg, Hamilton and Chemung Groups, with others from 
the Waverly Sandstones. (Preparatory for the Palaeontology of New 
York.) Part II. (State Cab. Nat. Hist.. December, 1896); pp. 97. 
Albany, 1870. 8vo. 
177. *Recent Progress in Geology. Trans. Alb. Inst., 1865. Vol. 
VI, pp. 291 — 294. Albany, 1870. 8vo. 
178. *Notice of the Fossil Plants of the Hamilton and Chemung 
Groups, with reference to the Source of the Sediments of these Form- 
ations. Proc. Am. Assoc. Ad. Sci., 19th meeting, Troy. 1870; p. 362. 
Cambridge, 1871. 8vo. 
179. *0n Relation of the Oneonta Sandstone and Montrose Sand- 
.«tone of Vanuxcni to the Hamilton and Chemung Groups. Ibid., p. 
362. 
180. *Note upon the Rocks of tlic Hurt nian System on the Pen- 
insula of Michigan. Ibid., p. 362. 
181. *Remarks on the Occurrence of the Genus Dithyrocaris in 
the Hamilton and Chemung Rocks of New York. Ibid., p. 363. 
182. Notes and Observations on the Cohoes MastocUm. 21st .\nn. 
